/Engine/Source/Developer/CollectionManager/Public/ICollectionManager.h
Note: Generally you won't need to update collections manually as the collection manager takes care of that as collections are saved to disk.
true if the update was successful. If false, GetLastError will return a human readable string description of the error.
bool UpdateCollection ( [FName](API\Runtime\Core\UObject\FName) CollectionName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) ShareType )